Insulator.



O.B.WALKER INSULATOR.

APPLICATION FILED 13110.28, 1911.

Ptented July 16, 1912.

un iran si'rafrns rafrsnr gorrron.

am. te. wanner, or TaYLoavILLE, Itrrnols.

. INsU'LA'roR.

To all whom .it may/concern:

f Be it known that I, ORAL B. VALKER, a

1 citizen of the AUnited States, residing at Taylorville, inl the countyot' Christian and State of Illinois, have invented certain new anduseful r-Improvements in Insulators, of which the following is aspecification, ref erence being had therein to the accompanying drawing.I

This invention relates to 'telegraph or telephone poles, and hasparticular referi ence to the means for support-ing the cross arms uponsaid poles.

One ofthe objects of this `invent-ion is the production .of eiiicientmeans for firmly holding the cross-arms in engagementwith the poles soas tolprevent the same from sagging when a strain is placed thereonwhile stringing the wires.

Another object of this invention is the product-ion of eiiicient 'crossarms wherein the same consists of a plurality of transversely yextending members havingA their ends connected together whereby the twoarms will be firmly held together.

`With these and other objects in view this invention consists of certainnovel constructions, combinations, and arrangements of parts as willbehereinafter fully described and claimed. y

In the drawings :e-Figure 1 is a front elevation of a. telegraph 'poleshowing'one of the cross arms in section. Fig. 2 ,isa top plan view ofthe cross arms showing the telegraph pole in section. Fig. 3 is a sideelevation of the telegraph pole showing the 'cross' arms in section.Fig. i is aside elevation of a telegraph pole partly in section showingthe manner of connecting the cross arms to 40.

' telegraph pole showing saidpoles. Fig. 5 is aside elevation of the thecross arm in elevation having the insulators removed therefrom. Fig. 6is an yenlarged sectional View showing the manner of connecting theinsulator supp'ortto one of the cross, arms. -Fig. 7 is an enlargedsectional view ci one of the insulator supporting bolt-s showing themanner of connecting the bracing rods by means of` the common connectingnut.

Referring to the drawings by numerals 1 designates the telegraph polewhich is provided'near the top thereof and upon each side with atransversely extending notch 2 within which are seated the cross arms 3.'These cross arms 3 areformed preferably of hollow pipe sectionscarrying at their respective Specication of Letters Patent.

curing bolt 15 passes.

braced as illustrated in Fig. 3.

ends elbows 4- to which'y are connected the r. s Joining pipe sectlons'5 for forming a substantially cont-inuous'cross arm extending upon bothsides of the\pole.

Insulator supporting bolts 6 are carried by the cross arms 3/'and are,provided with enlarged heads Y for holding the insulators 8 firmly inengagement with the bolt 6. These bolts 6 are .also provided near theirends with a flared portion 8 which is adapted to rest upon the upperedge 'of-the' cross arms- 3 forlimiting the downward movement of saidbolts through said cross arms. Alde-l pending stem 9 'is carried byueach bolt 6, which depending stem extends through the cross arms 3. Anut 10 is threaded upon the lower end of the depending stem 9 of each ofthe bolts 6 for firmly clamp-ing the bolts 6 in firm engagement with thecross arms. A Ynumber of these insulator supporting bolts 6 are usedupon `each of the cross arms so as to accommodate a number of wireswhich may be attached thereto. Of course, the usual insulators 8 areformed ofthe common insulating material and may be of any desired form.

A pair ot' brace arms 11 are carried upon each side of the pole andthese arpus 11 are provided with angularly disposed ends 12 which endsare engaged by a coupler nut 13, which coupler nut secures saidangularly disposed end 12 to the under threaded end ot -one of thecentral insulating bolts as illustrated Ain Fig. 1. The brace arms 11are provided with an eye 14 through which se- An arm 11 extends to eachside of the pole as illustrated in Fig. 1, thereby constitutingr asubstantially V- shaped brace, which brace may be readily detached byremoving the nuts 13 from the threaded ends of the inner insulatingbolts. A pair of arms 11 are secured upon both the back and front of thepole so that the arms upon each side of the post may be firmly Securingbolts 16 pass 'through the arms 3 for rmly holdin-g these arms inengagement with the pole. By, having a-plurality of these bolts 16 sopassing through the arms, obvious that these bolts will also assist inpreventing the arms Vfrom sagging upon their sides, as well as the bracearms 11 previously described. It will be `further o bvious that vthecrpss arms may also be readily removed from the pole by detaching thedifferent sections, and provided only one of the it will be y PatentedJuly 16, 1912.,

' .application led December 28, 1%11. Serial No. 668,290.

arms 3 should become damaged, it would not be necessary to replace theentire cross arm, but this damaged arm might be readily removed tand anew arm substituted therefor. Of course, it should be understood thatthe insulators S are molded upon the upper ends of the bolts 8, therebyfirmly holdingthe insulators in engagement with the bolts. 'What isclaimed isrf A y In a device of the character described, comprising apole having transverse notches on both sides and cross bolt perforationsat said notches, pairs of cross arms made of parallel members whichengage said pole notches, elbows on the ends of said arms andconnect-ing joints. between them, bolts through said arms and said pole,insulatorsupporting bolts on said cross arms, V-' shaped braces securedto said pole, the upper threaded portions of said braces being verticaland coupling nuts engaging the u per ends of said braces and the lowerends of said insulator bolts, as specified.

In testimony whereof I vhereunto aiiix my signature in presence of twowitnesses.

ORALB. WALKER. Witnesses I G. C. AoHnNBAor-I, W. E. DEMING.

